Chevy 283 HP Carb vapor locking
I purchased a 64 chevy pick up recently , it had a Edlebrock intake manifold and high
performance carburetor on it when I bought it. The system was working fine but I wanted to
change it back to stock so I purchased a 2 bbl intake manifold and a new rochester 2 bbl
carb. It runs ok on short runs of 10 to 15 minutes as long as the engine doesn't get too
hot. Water temp runs at about 180 degrees .
On longer runs at 60 mph after about 30 minutes it starts to act like the fuel flow is been
interrupted briefly and when I come to a stop at an intersection and attempt to pull away from
the engine quits. When I attempt to re- start it again it appears to be vapour locked. Again
the water temp run at 180 degrees.
Also after my last run of 60 miles on the freeway I noticed the orange paint is burnt off the
intake manifold ports directly below the carburetor mounts.
Would appreciate your advice on how to correct this problem.
was it a brand new carb and intake or used ?? if used u may want to buy a carb rebuild kit and tune it. also check the spark plugs to see if its running lean the tip of the plug should be kinda like a burnt white. also does it backfire at all ??
The carb is new and the intake manifold is used but it was all cleaned and just like new. No it dosen't back fire, we checked the timing and the plug gap and they are set correctly. It starts right up and runs as it should but when it gets up to operating temp it begins to vapour lock . When I shut it off it won't start until it cools down . Thank for your advice.
did u check any fuel lines maybe u have a broken line i know that is u have a slight crack thats letting air in to the fuel system it will vapor lock thats one main reason or check if any of the fuel lines are loose other than that not to sure
Search Chevrolet Classic Questions
Chevrolet Classic Experts